diff --git a/src/services/services.ts b/src/services/services.ts
index d2e4360725d..4d4a4f94ea5 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1286,7 +1286,7 @@ module ts {
         return "";
     }
 
-    interface DisplayPartsSymbolWriter extends SymbolWriter {
+    export interface DisplayPartsSymbolWriter extends SymbolWriter {
         displayParts(): SymbolDisplayPart[];
     }